Device for securing cross-pins in pistons.



No.y 828,402. PATENTED AUG. 14, 1906.

H. M. HART.

WHA/155555.- f D [NVE/WOR.

ATTORNEY.

' UNITED STATES PATENT oEEIcE.

HARRY M. HART, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE- HALF TOJAMES Gr. HEASLET, OF PHILADELPHIA, PENNSYLVANIA.

`DEVICE FOR SECURING CROSS-PINS IN PISTONS.

Patented Aug'. 14, 1906.

To all whom it 4 may concern,.- a

Be it known that I, HARRY M. HART, a citi- .zen of the United StatesofAmerica, residing `in the city and county of Philadelphia, in theState'of Pennsylvania, have invented a cer-- tain new and usefulImprovement in Devices for Securing Cross-Pins in Pistons, of whichthe-following is a true and exact description, reference bein had to theaccompanying drawings, whic form a part thereof.

My invention relates to pistons having cross pins secured to them, towhich couplingrods are united, as is shown, for instance, withgas-engines, the 'obj ect of my invention being to provide simple andeii'icient means for' securingV the cross-pins in place.

The nature of my invention will be best understood as described inconnection with the drawings in which it is illustrated, and in which#Figure 1 isa side elevation of the piston, showin the nature'of thecross-pin and the device or securing the pin in lace. Fig. 2 is alongitudinal cross-section t ough the v iston, taken as on the line 2 2of Fig. 1 and I* ig. 3 is a perspective view of a split ring used tohold the pm in place. l

kA is the iston, which is hollow, formed with inwar y extendingbearing-bosses, (indicated at A' andAz.) The internal diameter of thesebearings is preferably different, that indicated at a.' being greaterthan that indicated at a2. In the larger bearing and near the outer endthereof is formed an annular slot, (indicated at a3.)

B is the cross-pin, the ends B' andB2 of the pin being adapted to iit inthe bearings a.' and a2, as shown, and b preference the pin is formedywith a shoul er b?, which fits against the inner end of thebearing-boss A2.

O is a split elastic ring shown as formed with perforations O' C' at itsends, by which it can be drawn together and made smaller, so as to passinto the bearing a/ and into registry with the slot 0.3, into which itis then permitted to extend, as shown in Fi s. 1 and 2, being heldsecurely in place byt e slot and forming an abutment which prevents thewithdrawal of the in B.

I have indicate at D the end of the connecting-rod pivoted on the pin B.

My device is simple and entirely eflicient and needs no furtherdescription.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, isi 1. A hollow piston having bearings for a,cross-pin and an annular slot a3, formed in a bearing, in combinationwith a pin supported in the bearings and an elastlc spht 'ring C,

sprung into the slot a?, to form an abutment for the in.- 2. At

smaller diameter than bearing A', and said larger bearing A', havinganannular slot a3,

formed in it, in combination with a pin B,-

HARRY M. HART.

.Witnessesz l i i l CHAS. A. MYERS. D. STEWART.

ollow pistonhaving beari'n'gs A', andv A2, for a cross-pin, the bearingA2, having a soA

